| APA | Smart Define. (1970). christmas island imperial pigeon thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/christmas_island_imperial_pigeon/thesaurus/broader |
| Chicago | Smart Define. 1970. "christmas island imperial pigeon thesaurus" https://smartdefine.org/christmas_island_imperial_pigeon/thesaurus/broader (accessed October 1, 2026). |
| Harvard | Smart Define 1970, christmas island imperial pigeon thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/christmas_island_imperial_pigeon/thesaurus/broader>. |
| MLA | Smart Define. "christmas island imperial pigeon thesaurus" 1 January 1970. Web. 1 October 2026. <https://smartdefine.org/christmas_island_imperial_pigeon/thesaurus/broader> |